21780610040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{211}}^1\times {\mathrm{2131}}^1$

素因数の和:2533

約数の個数: 128

約数和(自身を含む): 56624555520

約数和(自身を除く): 34843945480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 173, 211, 280, 346, 422, 692, 844, 865, 1055, 1211, 1384, 1477, 1688, 1730, 2110, 2131, 2422, 2954, 3460, 4220, 4262, 4844, 5908, 6055, 6920, 7385, 8440, 8524, 9688, 10655, 11816, 12110, 14770, 14917, 17048, 21310, 24220, 29540, 29834, 36503, 42620, 48440, 59080, 59668, 73006, 74585, 85240, 119336, 146012, 149170, 182515, 255521, 292024, 298340, 365030, 368663, 449641, 511042, 596680, 730060, 737326, 899282, 1022084, 1277605, 1460120, 1474652, 1798564, 1843315, 2044168, 2248205, 2555210, 2580641, 2949304, 3147487, 3597128, 3686630, 4496410, 5110420, 5161282, 6294974, 7373260, 8992820, 10220840, 10322564, 12589948, 12903205, 14746520, 15737435, 17985640, 20645128, 25179896, 25806410, 31474870, 51612820, 62949740, 77787893, 103225640, 125899480, 155575786, 311151572, 388939465, 544515251, 622303144, 777878930, 1089030502, 1555757860, 2178061004, 2722576255, 3111515720, 4356122008, 5445152510, 10890305020, 21780610040]

約数ペア:

[(1, 21780610040), (2, 10890305020), (4, 5445152510), (5, 4356122008), (7, 3111515720), (8, 2722576255), (10, 2178061004), (14, 1555757860), (20, 1089030502), (28, 777878930), (35, 622303144), (40, 544515251), (56, 388939465), (70, 311151572), (140, 155575786), (173, 125899480), (211, 103225640), (280, 77787893), (346, 62949740), (422, 51612820), (692, 31474870), (844, 25806410), (865, 25179896), (1055, 20645128), (1211, 17985640), (1384, 15737435), (1477, 14746520), (1688, 12903205), (1730, 12589948), (2110, 10322564), (2131, 10220840), (2422, 8992820), (2954, 7373260), (3460, 6294974), (4220, 5161282), (4262, 5110420), (4844, 4496410), (5908, 3686630), (6055, 3597128), (6920, 3147487), (7385, 2949304), (8440, 2580641), (8524, 2555210), (9688, 2248205), (10655, 2044168), (11816, 1843315), (12110, 1798564), (14770, 1474652), (14917, 1460120), (17048, 1277605), (21310, 1022084), (24220, 899282), (29540, 737326), (29834, 730060), (36503, 596680), (42620, 511042), (48440, 449641), (59080, 368663), (59668, 365030), (73006, 298340), (74585, 292024), (85240, 255521), (119336, 182515), (146012, 149170)]